Not Budgeting Costs
It's hard to believe, but true - many couples do not create a budget when it comes to wedding preparation and end up in a deep hole of debt. The very first thing you should do to avoid disastrous (and bankrupting) wedding mistakes is devise an itemized budget, allowing for the necessary requirements, such as a venue for both the ceremony and reception, food and drinks, flowers, favors, decorations, etc. If anything is left over, either use this money for your honeymoon or spend it on something a little more frivolous, like a horse drawn carriage for your departure from the reception.
Budgeting ahead of time also involves your acknowledging the fact that you may surpass the total by at least 10%. Surprises do happen, so cutting back on other needless things will ensure that you don't go over budget too much. In these initial wedding preparation stages, you and your fiancé need to discuss who will be paying for what. It used to be that the bride's parents paid for everything, but this ideal is slowly fading away. If you're still coming up short on funds, there are literally hundreds of ways to cut costs for your wedding day, including having fewer guests, choosing an off-season date, selecting flowers that are in season, and having friends and family play a bigger part by making the wedding cake or trying their hand at photography.